Where was Bézenville when gas masks were a hot item in New York a few months ago? These are much more stylish than anything you’ll find down at the Spy Shop. I think my favorite is the “decapotable” model.
Unfortunately it does not appear that there are any retailers in the US. The Parisians are a step ahead of us in the fashion department yet again. However, if you really want to be a trendsetter, you can buy one online.